(4x-3y)^2(4x-3y)
=(16x^2-24xy+9y^2)(4x-3y)
=64x^3-96x^2y+36xy^2-48x^2y+72xy^2-27y^3
=64x^2-144x^2y+108xy^2-27y^3
If the x goes after (1-) then it’s going to be x=-4
Using an exponential function, it is found that the multiplier that would allow you to predict the population of bacteria after 2 hours is of 9.
<h3>What is an exponential function?</h3>
An exponential function is modeled by:

In which:
In this problem, the bacteria triples every hour, hence the rate of change is b = 3, and the equation is:

Hence, after 2 hours:

Which means that the multiplier is of 9.
More can be learned about exponential functions at brainly.com/question/25537936
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